The aim of this study is to assess the findings of mediastinal/hilar LN sampling by EBUS-TBNA in patients with non-sarcoidosis interstitial lung disease ( ILD) who demonstrate LN enlargement on chest imaging. Patients with non-sarcoidosis ILD referred for bronchoscopy will undergo LN sampling by EBUS-TBNA. Cytology results will be recorded along with clinico-radiologic features, BAL findings, histology and final ILD diagnosis.

Inclusion Criteria:

1. non-sarcoidosis ILD (low probably of sarcoidosis based on radiology),
2. referred for bronchoscopy (BAL, TBLB or TBCB) in the Interventional Pulmonology Unit at Sheba Medical Center
3. Patients with LN enlargement ≥1 cm in short diameter at stations 2, 4, 7, 10 or 11 (LN stations accessible to EBUS-TBNA)

Exclusion Criteria:

1. known ILD
2. ILD with no indication to bronchoscopy
3. contraindication to bronchoscopy .

patients referred for bronchoscopy (BAL, TBLB or TBCB) in the Interventional Pulmonology Unit at Sheba Medical Center